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Location of landmarks, planes, and measurements used in the study. S indicates Sella; N, Nasion; A, point A; B, point B; Po, Porion; Or, Orbitale; Pog, Pogonion; Me, Menton; Go, Gonion; Gn, Gnathion; ANS, anterior nasal spine; PNS, posterior nasal spine; M, lower first molar; P, lower first premolar; U1, upper incisor tip; U1R, upper incisor apex; L1, lower incisor tip.
